Shedding mechanism for looms.



v P-ATENTED SEPT. 13, 1904. R. GROMPTON.

SHEDDING MECHANISM FOR LOOMS.

APPLICATION FILED JUNE 7. 1904.

N0 MODEL.

[NVE/VTUH." FANUUL HEHUM/ TUN W/T/VESEEE/ /m/z m wL w x TTUFINEVE/ No. 770,168. Patented September 13, 1904.

UNITED STATES PATENT OFFIQE.

RANDOLPH OROMPTON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO RANDOLPH OROMPTON, GEORGE OROMPTON, EDWARD D. THAYER, AND WILLIAM B. SOOFIELD, OF WORCESTER, MASSACHUSETTS.

SHEDDING MECHANISM FOR LOOMS.

SPECIFICATION forming part of Letters Patent No. 770,168, dated September 13, 1904.

Application filed June 7, 1904. Serial No. 211,526. (No model.)

To (tZZ whom it may concern: F, extended from the side of the notched Be it known that I, RANDOLPH ORoMP'roN, harness-controlling lever Gr, mounted to be 5 a citizen of the United States, residing at turned freely about a fulcrum G The parts Worcester, county of Worcester, and State of so far described are common to the patent re- 5 Massachusetts, have invented an Improvement ferred to, as is also a locking deviceadapted in Shedding Mechanism for Looms, of which to engage the inner free ends of the vibratorthe following description, in connection with lever, said locking device not being herein the accompanying drawings, is a specification, lettered or particularly described. In accordlike letters on the drawings representing like ance with my invention I have erected on the 10 parts. arch A lugs a, that receive a rock-shaft a.

This invention has for its object to improve This rock-shaft receives and forms a fulcrum the-class of shedding mechanism represented fora series of elbow-levers H, one only shown 0 in United States Letters Patent N o. 397 ,858, in Fig. 2, said levers having a long arm it and dated February 12, 1889. a short arm 72 the downturned inner end of 5 The particular feature comprising the inthe long arm being grooved to rest on and vention to be herein described and claimed is, embrace the upper edge of the connector F. comprehended in a series of elbow levers (See Fig. 1.) The short arm of each elbowadapted to ride on the upper edges of the conlever has attached to it a draw-spring b the nectors uniting the vibrator-gears with the opposite ends of each draw-spring being con- 20 harness levers or jacks and means for simulnected with a finger if, rising from a bar it,

taneously turning said elbow-levers to remove attached to the arch or other part of the loomtheir longer arms from contact with the conframe by suitable bolts lb The draw-springs nectors, which is frequently necessary in the acting on the short arms of the elbow-lever manipulation of the loom. keep the inner ends of the longer arms of said 5 Figure 1 in side elevation represents a suflevers pressed upon the upper sides of the ficient portion of the head motion of a shed' connectors, so that whenever the indications forming mechanism of a loom to enable my or projections of the pattern-surface retire invention to be understood; and Fig. 2 is a from under the vibrator-levers the spring,actperspective detail showing one of the elbowing through the elbow-levers and the vibra- 3 levers and a connector, together with the detor-gears, will cause the said gears and the vice employed for simultaneously turning all vibrator-levers to descend substantially insaid elbow-levers. stantly, so that the leading tooth of the vi- A represents part of the arch or upper porbrator-gear next to be engaged by the teeth tion of the framework of a loom, and A an of the cylinder-gear may be correctly engaged 35 attached portion that sustains the cylinderwith the teeth of said latter gear to cause a gears B. The portion A has a rod O, on complete and proper movement of the vibrawhich is fulcrumed a series of vibrator-levers tor-gear, and consequently of the harness-le- 8 5 O, each one supporting on a pivot O extendver connected therewith. The action of this ed from the side thereof, a vibrator-gear D, elbow-lever is more fully described in an ap- 4 having a crank-pin D, adapted to be turned plication filed by me January 18, 1904, Serial in one and then in an opposite direction by No. 189,4:56.

one or the other of the continuously-rotating In running looms of this class it is freo cylinder-gears according to the indications of quently necessary to raise and hold out of acthe pattern-surfaces sustained by the patterntion for a longer or shorter period the elbowv shaft E, one end of which is represented in lever and to remove the same from contact Fig. 1. Each crank-pin D has pivoted to it with the connectoras, for instance, when a one end of a connector F, the opposite end of connector vibrator-gear and vibrator-lever which is slotted (see Fig. 2) to embrace a stud need to be changed or when a harness-lever with the connectors, I have added to the loom what I shall designate as a releasing device, it being represented as a plate d, having cam-slots cl,that embrace studs or guides 0Z When the releasing device is pulled out by the engagement of its handle d. by the operator into the.positio n ;Fig. 2, the releasing device has also imparted to it a bodily lateral movement, causing the outer edge of said releasing device to contact with the short arms of the series of elbow-levers and turn them on or ,with. the rock-shaft a, such turning, of the elbow-levers removing the ends of their longer arms from contact with the connectors,

that whatever is desired to accomplish during theremoval of the elbow-levers from the-connectors may be done. .When i the releasing device is moved inwardlyiromdts position, Fig. 2, the said releasing device is moved bodily laterallytoward-the vibrator-gears, thus permitting the spiral springs connected .with each one of said elbow-levers to turn said elbow-levers so that the. ends of their longerarms descend. uponand. rest in a yieldingv manner upon the tops of the connectors. I .believe I. am the. first to provide .an. independent .r.eleasing device capable of being moved when the loom is in motion or at rest to simultaneouslyelevate allof the levers or otherdevices that act to produce pressure uponithe. upper. side of the connectors to effectthe engagement ofthe teeth offa vibrator-gearwith the teeth of a cylinder-gear, and

a M A- hence I desire to claim this feature of my invention broadly.

Having fully described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. In a loom having a harness-lever, a vibrator-lever, a vibrator-gear, and a connector intermediate said vibrator-gear and harnesslever, a series of spring-controlled devices contacting normally in the running of the loom with the upper sides of the connectors,

.and. a device independent of the vibrator-levers and vibrator-gears to move said springcontrolled devices out of contact with said connectors.

2. In a loom, a vibrator-lever, a v1bratorgear pivotally mounted thereon, a harness-le- 

